D13203: Add Typewriter annotation tool in Okular

[Dileep Sankhla]

dileepsankhla added a comment.


  > I didn't mean to change anything in Poppler. I meant it's the way it works in Poppler right now. I assume if both 'rg' operator and 'ca' entry are applied, alpha gets multiplied. Probably also depending on >blend mode. I don't know how this works exactly, it's a longer read through AnnotFreeText::generateFreeTextAppearance and the spec (e.g. 11.6.3 Specifying Blending Colour and Blend Mode). Maybe you >can figure it out on your own?
  
  It's also complicated for me to comprehend but there is a blending mode function B(Cb,Cs) that multiplies the source color with the backdrop color. If not necessary, I won't go into the details.
  
  Btw I have updated the revision to have typewriter background transparent in PagePainter.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D13203

To: dileepsankhla
Cc: ltoscano, ngraham, tobiasdeiminger, aacid, okular-devel
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